Slip joint for well casings



une 26, 1923.

- T. E. ADAMS SLIP JOINT FOR WELL CASINGS Filed Feb. 1, i927 T705. E HD5/'75.

atto: nu,

ltiltivili SI'ATS PATENT QFCE.

THOMAS E. ADAMS, 0F

SLIP JOINT FOR BEATRICE, NEBRASKA.

WELL casinos.

Application filed February 1,1927. Serial No. 165,164.A

My invention relates to slip joints for well casings and similar tubular sections7 its object being the provision of joint members at the opposite ends of the casing sections of such construction that the sections may bel quickly and leaving any exposed inner side of the casing,

easily interfitted without rough edges on the theI construction includino also an easily operated latchiiig device for effectively preventing the accidental disasseinbling of the sections after they have been my object to so that they may and matei'ial cost and so as to utilize w material which which sheet metal is wOlked being cut down design permitting welding for uni of power driven united. Furthermore, it is design the joint members be formed at a` low labor aste in all shops in v the labor cost by mea-ns. of construction the employment of spot various parts and for performing the is found ting the swages forming operations.

Having in view ythese which will be pointed out in the objects and others following description, I will now refer to the drawings. in which:

Figure 1 is a view in perspective showing the interlocking joint portions of two sections of well casing.

Figure 2 isv wise through a sectional view taken lengththe interlockingl portions of two oint sections.

Figu re 3 is a. view in perspective ofn casing joint of slightly modified, forni.

Figure 4 is a view in lengthwise section so through one wall of the joint members v shown in Figure 3. l

Since the joint was initially and primarily designed fo tions of well casing,

r the interlocking of secn the invention will be described with particular reference to this Such casing is generally made from galvanized sheet steel which is formed into cylindrical sec-tions and portions which with end provided Ilillien the are interlitting.

cylindrical sections are made of sheet metal of the lighter g seam is employe tion of Figure 1..

anges, the double lock rollis d, as shown at the top por- In meta-l of the heavier gauges such a. joint would be apt to loosen the Zinc coat and the seam must therefore be formed in some other manner, as for eX- ample, by riveting or welding.

features of my sheet metal casi of the seam.

The novel joint are applicable to all iigs regardless of the formk In carrying out my invention I provide each section of the'casing with ar male and female end. In the case of the male end, only an outwardly turned annular ridge 1 2 is formed to define the inner limit of that end portion. Surrounding the section 10,on its male end and 'adj acent the annular ridge 12 is a` ring 13 which is preferably spot welded to the section and which is provided with openings between the ring and the body of the section for the latching device which vwill subsequently be described.

The opposite end portion of the section is also provided with an annular groove 14 which in this case is inwardly directed. rThe portion from the groove 14 to the outer end of the section is enlarged in diameter to twice the thickness of the metal by swaging, so that in lengthwise section the walls are in the form of an ogee curve. It will be apparent from an inspection of Figure 2 that when two sections are joined together in end to end relation, their inner walls will be continuo-us except for the annular groove at 12 and for the annular ridge at 14. Both of these, however, are smooth curves and the ridge at 14 completely covers the cut end of the male portion of the section so that no rough edges can be cX- posed. The walls of the male end are aligned with. the walls'of the body portions of its section and of the companion section.

The joint is further provided with enteriial means for locking the sections together' as to prevent. any accidental displacement or the breaking of the joint. As before eX- plained, the ring 13 surrounds the male` end of the section 10. A similar ring 15 of somewhat larger diameter surrounds the female end of the section 11 and this also is provided with openings for the latching devices. The ring 15 is secured to the section by spot welding. The latching device itself consists of tapering strips 16 of sheet metal. These strips 16 are secured in place at the time the ring 15 is secured to the section 11 and they also are spot welded so that the section and the ring 15 and the latcliing devices 16 are in effect integral. The projecting ends of the tapering latching members 16 are turned at 17 over the outer surface of the ring 15. The positions of the latching members 16 and the positions of the gaps between the ring 13 and the section 10 are such that they will register when the sections 10 and 11 are joined. They may be uniformly spaced about the circumference of the sections, or if preferred, they may be so spaced that the sections Will not interlock except' in one definite axial position. Insome instances this .may be desirable in order to prevent the seams of the sections from being placed too near each other when the sections are joined by clumsy or inexperienced Workmen.

ln assembling the casing itis only necessarjT to force the sections together in end to end. relation in such a. manner that the tongues of the latching ldevices 1G Will enter the gaps between the ring 13 and the section lOland by then turning. over the projection ends of the latching` devices against the outer surface of the ring 13.

The double lock roll seam which unites the tivo edges to forma section in tubular vform is generally of considerable thickness. rThe inside of the section is smooth and the ext-ra thickness is all on the o1itsicle,'thus making tight interlocking` of the sections difficult. rllhis may be avoided by swaging the female end of the .section throughout its length so as to provide a longitudinal groove on its inner surface.v this groove having a Width and depth suflicientto accommodate the roll on the outer surface of the male section. By properly locating this groove in its relation to the tongues 1G-and the vgaps in the ring 13 it serves as a guide for properly assembling the-sections.

it is obvious, of course, that the invention is susceptible of numerous variations, the number of these variations being so great that it is impossible to illustrate all of them. (lne of these modified forms is shown in Figures 8 and il. In the construction the male end ofthe sect-ion is provided With a tongue 1G by slitting the metal and turning the tongue outwardly so that it lies on the outer side of the female end of the section as shown in Figure t. The lock is produced by'slitting the metal of the female end of the section transversely to Aform a loop 13 which is -spaced from the body of the metal.l

In assembling thetwo sections the tongue 16 will vpass through the loop 13 so that it may be turned down on t-he loop. The same re-V to provide either a tongue 16 or a loop 13` or both. y f

Having thus described my invention in such full, clear, and exact terms that its construction and operation will be readily understood by others skilled in the art to Which itpertains, what I claim as new and desire to secure by Letters Pat-ent of the United States is :V

l. in combination, a pair of tubular sections having intertting male and female end portions7 an annular ridge on the outer surface of said male portion and an annular ridge on the inner surface of said female portion, bands surrounding and secured to said male and female end portions respectively, said ridges and said bands being adapted to prevent the telescoping of said sections, and straps secured tothe band on said female portions and releasably secured to the band on said male portion.4

2. In combination, a pair of cylindrical sections having'intertitting male and female end portions. the male portion of the section having theV diameter ofthe body portion of the section and being separated therefrom by an annularoutwardly projectingridge, the female portion of the 'other of said tivo sections having a diameter greater than the diameter of the body portion of the section and being separated therefrom by an annular inwardly projecting ridge7 rings surrounding said male and female end portions respectively and secured thereto, said tWo rings constituting stops totprevent the telescoping of said sectionstand straps positioned between said rings and said male and female end portions of `said sections, said straps being fixedly secured to said female portion and releasably secured to said ring surrounding said male4 portion.l

In testimony whereof I affix my signa-ture.

'rHoMAs E. ADAMS. 

